167 lines
5.4 KiB
JavaScript
167 lines
5.4 KiB
JavaScript
// taken from http://stackoverflow.com/questions/901115/get-query-string-values-in-javascript
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var urlParams = {};
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(function () {
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var e,
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a = /\\+/g, // Regex for replacing addition symbol with a space
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r = /([^&=]+)=?([^&]*)/g,
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d = function (s) { return decodeURIComponent(s.replace(a, " ")); },
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q = window.location.search.substring(1);
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while (e = r.exec(q))
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urlParams[d(e[1])] = d(e[2]);
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})();
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function mapsetup(divname, options) {
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div = document.getElementById(divname);
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if (options.fullscreen) {
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permalink = 'permalink';
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div.style.top = 0;
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div.style.left = 0;
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div.style.position = 'absolute';
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div.style.width = '100%';
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div.style.height = '100%';
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}
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else {
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div.style.height = options.height;
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div.style.width = options.width;
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div.style.float = options.float;
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permalink = {base: options.href, title: "View larger map"};
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}
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map = new OpenLayers.Map(divname, {
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controls: [
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new OpenLayers.Control.Navigation(),
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new OpenLayers.Control.ScaleLine(),
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new OpenLayers.Control.Permalink(permalink)
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],
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displayProjection: new OpenLayers.Projection("EPSG:4326"),
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maxExtent: new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
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projection: "EPSG:900913",
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units: "m",
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maxResolution: 156543.0339,
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numZoomLevels: 19
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});
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for (x in options.layers) {
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layer = options.layers[x];
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console.log("setting up layer: " + layer);
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if (layer.indexOf("Google") >= 0) {
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if (options.google_apikey && options.google_apikey != 'null') {
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var gtype = G_NORMAL_MAP;
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if (layer.indexOf("Satellite") >= 0) {
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gtype = G_SATELLITE_MAP;
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} else if (layer.indexOf("Hybrid") >= 0) {
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gtype = G_HYBRID_MAP // the normal map overlaying the satellite photographs
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} else if (layer.indexOf("Physical") >= 0) {
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gtype = G_PHYSICAL_MAP // terrain information
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}
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// this nightmare is possible through http://docs.openlayers.org/library/spherical_mercator.html
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googleLayer = new OpenLayers.Layer.Google(
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layer,
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{type: gtype,
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'sphericalMercator': true,
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'maxExtent': new OpenLayers.Bounds(-20037508.34,-20037508.34,20037508.34,20037508.34),
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projection: new OpenLayers.Projection("EPSG:3857")}
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);
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map.addLayer(googleLayer);
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} else {
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console.log("no API key defined for Google layer, skipping");
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}
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} else if (layer == 'OSM') { // OSM default layer
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map.addLayer(new OpenLayers.Layer.OSM("OSM (Mapnik)"));
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} else { // assumed to be a URL
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text = layer.match(/([^.\/]*\.[^.\/]*(\/[^\$]*)?)\/.*$/i) // take the first two parts of the FQDN and everything before the first $
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map.addLayer(new OpenLayers.Layer.OSM("OSM (" + text[1] + ")", layer));
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}
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}
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if (options.format == 'CSV') {
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pois = new OpenLayers.Layer.Text( "CSV",
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{ location: options.csvurl,
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projection: new OpenLayers.Projection("EPSG:4326")
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});
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} else if (options.format == 'GeoJSON') {
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pois = new OpenLayers.Layer.Vector("GeoJSON", {
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protocol: new OpenLayers.Protocol.HTTP({
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url: options.jsonurl,
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format: new OpenLayers.Format.GeoJSON()
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}),
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strategies: [new OpenLayers.Strategy.Fixed()],
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projection: new OpenLayers.Projection("EPSG:4326")
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});
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} else {
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pois = new OpenLayers.Layer.Vector("KML", {
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protocol: new OpenLayers.Protocol.HTTP({
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url: options.kmlurl,
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format: new OpenLayers.Format.KML({
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extractStyles: true,
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extractAttributes: true
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})
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}),
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strategies: [new OpenLayers.Strategy.Fixed()],
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projection: new OpenLayers.Projection("EPSG:4326")
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});
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}
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map.addLayer(pois);
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select = new OpenLayers.Control.SelectFeature(pois);
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map.addControl(select);
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select.activate();
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pois.events.on({
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"featureselected": function (event) {
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var feature = event.feature;
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var content = '<h2><a href="' + feature.attributes.href + '">' +feature.attributes.name + "</a></h2>" + feature.attributes.description;
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popup = new OpenLayers.Popup.FramedCloud("chicken",
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feature.geometry.getBounds().getCenterLonLat(),
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new OpenLayers.Size(100,100),
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content,
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null, true, function () {select.unselectAll()});
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feature.popup = popup;
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map.addPopup(popup);
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},
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"featureunselected": function (event) {
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var feature = event.feature;
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if (feature.popup) {
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map.removePopup(feature.popup);
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feature.popup.destroy();
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delete feature.popup;
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}
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}
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});
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if (options.editable) {
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vlayer = new OpenLayers.Layer.Vector( "Editable" );
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map.addControl(new OpenLayers.Control.EditingToolbar(vlayer));
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map.addLayer(vlayer);
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}
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if (options.fullscreen) {
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map.addControl(new OpenLayers.Control.PanZoomBar());
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map.addControl(new OpenLayers.Control.LayerSwitcher());
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map.addControl(new OpenLayers.Control.MousePosition());
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map.addControl(new OpenLayers.Control.KeyboardDefaults());
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} else {
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map.addControl(new OpenLayers.Control.ZoomPanel());
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}
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//Set start centrepoint and zoom
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if (!options.lat || !options.lon) {
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options.lat = urlParams['lat'];
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options.lon = urlParams['lon'];
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}
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if (!options.zoom) {
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options.zoom = urlParams['zoom'];
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}
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if (options.lat && options.lon) {
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var lat = options.lat;
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var lon = options.lon;
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var zoom= options.zoom || 10;
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center = new OpenLayers.LonLat( lon, lat ).transform(
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new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
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map.getProjectionObject() // to Spherical Mercator Projection
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);
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map.setCenter (center, zoom);
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} else {
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pois.events.register("loadend", this, function () { map.zoomToExtent(pois.getDataExtent()); });
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}
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}
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